/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.sql.parser.ddl;

import org.apache.calcite.sql.SqlAlter;
import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.SqlSpecialOperator;
import org.apache.calcite.sql.parser.SqlParserPos;
import org.checkerframework.checker.nullness.qual.Nullable;

import static java.util.Objects.requireNonNull;

/** Base class for ALTER DDL sql calls. */
public abstract class SqlAlterObject extends SqlAlter {
    private final SqlSpecialOperator operator;
    protected final SqlIdentifier name;

    protected SqlAlterObject(SqlSpecialOperator operator, SqlParserPos pos, SqlIdentifier name) {
        this(operator, pos, null, name);
    }

    protected SqlAlterObject(
            SqlSpecialOperator operator,
            SqlParserPos pos,
            @Nullable String scope,
            SqlIdentifier name) {
        super(pos, scope);
        this.operator = operator;
        this.name = requireNonNull(name, "name cannot be null");
    }

    public String[] getFullName() {
        return name.names.toArray(new String[0]);
    }

    @Override
    public SqlOperator getOperator() {
        return operator;
    }
}
